beginning to plan my first build, trying to choose between 1988 Fiero or 91-93 Mustang for ITB.

I have experience racing Fieros in autocross, (runner-up for 2 seasons) and know more about GM cars in general, but the Mustang has more aftermarket support. Is the 91-93 twin plug motor the way to go, or an early carb car?

Fiero looks better on paper, 4 wheel disc brakes, mid-engine, 100lbs less and nearly equal power.

Any other thoughts?

I'd like to run RWD but options are few, even fewer if you want something American.

thanks